About this item 50 amp automatic transfer switch can be used to automatically switch between inverter power and a generator. rv transfer switch automatically senses generator power and prevents two power sources from entering the AC distribution panel at the same time 50 amp 120/240 AVC automatic transfer switch is your good choice. If you are using public power and it goes out, when the generator is turned on it will automatically switch the power to it.The green light is in an active state RV automatic transfer switch with quick-connect terminals for easy installation. It will start a timer and automatically switch over to generator power supply after a 20-45 sec delay. Wide application-RV, SPEEDBOAT,OUTDOOR Inverter with automatic transfer switch: 120/240 VAC, 50 Amp Automatic transfer switch 50 amp has been pre-wired to automatically change the primary source of AC current from shore power to generator or inverter power when activated › See more product details